通过NGC 1068中的宇宙射线上行散射探测非弹性暗物质

The ups and downs of inelastic dark matter: Electron recoils from terrestrial upscattering

The growing interest in the interactions between dark matter particles and electrons has received a further boost by the observation of an excess in electron recoil events in the XENON1T experiment. Of particular interest are dark matter models in which the scattering process is inelastic, such that the ground state can upscatter into an excited state. The subsequent exothermic downscattering of such excited states on electrons can lead to observable signals in direct detection experiments and gives a good fit to the XENON1T excess. In this work, we study terrestrial upscattering, i.e. inelast…

No room to hide: implications of cosmic-ray upscattering for GeV-scale dark matter

The irreducible upscattering of cold dark matter by cosmic rays opens up the intriguing possibility of detecting even light dark matter in conventional direct detection experiments or underground neutrino detectors. The mechanism also significantly enhances sensitivity to models with very large nuclear scattering rates, where the atmosphere and rock overburden efficiently stop standard non-relativistic dark matter particles before they could reach the detector. In this article, we demonstrate that cosmic-ray upscattering essentially closes the window for strongly interacting dark matter in the…

Cosmic-ray upscattered inelastic dark matter

Light non-relativistic components of the galactic dark matter halo elude direct detection constraints because they lack the kinetic energy to create an observable recoil. However, cosmic-rays can upscatter dark matter to significant energies, giving direct detection experiments access to previously unreachable regions of parameter-space at very low dark matter mass. In this work we extend the cosmic-ray dark matter formalism to models of inelastic dark matter and show that previously inaccessible regions of the mass-splitting parameter space can be probed. Conventional direct detection of non-…

多个冷却通道对暗致密天体形成的影响

The Effect of Multiple Cooling Channels on the Formation of Dark Compact Objects

本文研究耗散暗区中由非弹性暗物质模型形成的致密天体，探讨暗轫致辐射和快速衰变等多个冷却通道对其质量和丰度分布的影响，为约束和区分暗区提供依据。

IceCube 上的宇宙线加速暗物质

Cosmic Ray-Boosted Dark Matter at IceCube

本文重新研究 IceCube 对宇宙线加速暗物质的探测能力，涵盖电子与核子散射及弹性和深度非弹性过程，发现其对约 100 keV 以下（电子散射）和 MeV 量级（核子散射）暗物质尤为敏感。

用非弹性暗物质复兴 MeV-GeV 间接探测

Reviving MeV-GeV Indirect Detection with Inelastic Dark Matter

本文提出非弹性暗物质模型，利用银河系中暗物质高动能触发上散射再生激发态，在 MeV 能段产生可探测伽马射线，从而复兴亚 GeV 热遗迹暗物质的间接探测前景。